Latch



Feb 28, 1928.

C. M AXON LATCH Filed Aug. 20. 1926 CURT/S MAXUN A TTORNE Y.

Patented Feb. 28, 1928.

N-ITED-ISTATES PATE T FFECE.

CURTIS MAXON, or snw'rntnn, CALIFORNIA.

LATCH.

Application filed August 20, 1326. Serial No. 130,412.

This invention relates to latches of the type controlled by a pushbutton'movable perpendicularly to a' supporting surface through a knobmounted on the surface; and

it is the object of the invention to provide a simplified and practicalmounting for the control mechanism which eliminates the use Theoperating control is particularly adapted for use in connection with thebolt mechanism of a latch such as shown in my U. S. Patent No.1,571,453, of Feb. 2, 1926; and it is a still further object of theinvention to simplify the operating mechanism ofmy said prior patent andadapt it for con- Venient manufacture at minimum expense. The inventionwill be readily understood from the following description of theaccompanying drawings, in which: I i

Fig. 1 is a horizontal section through the latch mounted on a cupboarddoor. I i

Fig. 2 is a side elevation of the latch operating means with the partsdisassembled.

Figs. 3 and i are transverse sections on the lines 3-3 and H of Fig. 1.Fig. 5 is a fragmentary front elevation of a cupboard door, with themounted thereon. The'latch operating mechanism forming the subjectmatter of the present invention is illustrated as mounted in a bore 1extending through a cupboard door2 which seats in a frame 8, theoperating means con-'v 0 trolling a bolt mechanism for the latch whichis mounted on the innersurface of the door with the bolt preferablyadapted for sliding movement parallel tothe surface of the door so as toproject and retract the bolt relative to a cooperating catch amounted onframe 8.

A casing 5 for the bolt mechanism has an opening in its base overlyingthe inner end of bore 1, and a bolt 6 slidable in the casing is normallyprojected for engaging catch 1 by means of a spring 7. The means forretracting the bolt against the tension of its spring so as to disengagecatch 4, comprises an improved latch I arm 8 projecting transverselyfrom the bolt in casingb, and extending. through the openmg in the baseof the easing into the bore 1. The arm 8 is engaged by an operating rod9 of the control mechanism for the latch, said 1 operating rodbeingadapted for'axial movement in bore 1 in alinement with arm 8, withthe-cooperating ends 10 of the arm and rod inclined relative to thedirection'of movement of both the rod 9 and bolt 6 as shown in Fig. 1,so that whenthe rod is pushed inwardly the arm 8 is shiftedlat grzlillyrelative to the rod for retracting the o t. y 'The control mechanism forthe latch, of which the rod 9 is the actuating means, overlies the outerend of bore 1, and comprises a knob 12 for manually swinging door 2- anda push button 13 slidable in the bore 14 of the knob for shifting rod 9soas to retract bolt 6. v mounted on door 2 without the use of fasteningscrews or the like, so that the elimi nation of openings through theknob for such fastening means permits the knob beinginex pensivelyconstructed of glass or other frangiblematerial; and the mounting forThe knob and push button are the knob and push botton' also provides forready adjustment to secure the parts in place and adapt the rod'9 forengaging arm' 8, irrespective of variations in the thickness of door 2.As an instance of thisarrangement, a barrel 15 is adapted for projectionthrough the bore of knob. 12, with an exterior peripheral flange 16 attheouter end, v

of the barreladapted for abutment against the outer end .of the knob forlimiting inward movement of the barrel. I An interior peripheral flange17 is also provided'at the outer end of barrel 15, and the push button13 is insertable through the inner end of the barrel with an enlargedbase 18 of the push button adapted for abutment against the. flange 17to limit outward movement of the push button when'its head projectsbeyond knob 12 just sufficiently to permit it being pushed inwardly bythe finger.

The push button is adapted to be moved inwardly relative to barrel 15and knob 12,

but is'preferably held against rotation by a key 19: stamped in thesurface of-the barrel- The barrel 15 is of a length to project beyondthe inner end of knob 12 into the bore 1 with the flanged innerendof theknob abutting against the door 2, and the operat ing.rod,9extends intobarrel 15 through washer 22 and the coil spring 21, with the inner endof the rod threaded into push button 13 as shownat23.

The knob assembly as thus described is heldin place on the door. bymeans of a sleeve 25 insertable in the inner endof bore 1 before thecasing 5 is mountedlin place, the sleeve having a flanged end 26 adaptedto engagethe inner end of bore 1, Withthe opposite end-2710f the sleeveadapted for threaded engagement on the threaded inner,

end28 of barrel=15,so as toclamp the knob 12 between flange 16 and theouter surface ofdoor 2 and also securethe barrel 15 and its associatedparts. i

The inner end 28- of barrel 15 is prefer.-

ably threaded for an appreciablelength, and

the, inner end ofthebore of knob 12 is prefably countersunk asshown at30 to adapt it forthe reception t the inner end of sleeve 25,so that thesleevemay be tightened up on the barrel as far as necessaryto clamp themechanism onmloors of, diil'erent thick ness.

sleeve is preferably notched as shown at 31,

and a tooli35= shown in Fig. 2, is provided with bins 32-ada11ted -forrec p tingle-eve 25Qiw-ith shoulders 33 i of the pins engagingthenotches, so thatrtheltool is adapted to,

rotate.- the sleeveandiis held against lateral displacement. WVhen-theoperating mechanism is assembled, and before a casing 15 1 is mounted inplace, it is also necessaryto adjust rod Qrelativeto push button 13 sothat,

the cooperating surfaces 10 will beiin operatiye relation and for thispurpose the op posite end of tool 35 is notched as shown at;

34 to correspond to the end of rodc9, so that thetool may beused forturning the rodto provide the desired longitudinal and rotatable/adjustment.

I claim:

1. A- Iatch' comprising a bolt, a support having an opening.therethrough, l a barrel extending into .one end iofsard open1ng,anoperating rod movable m said barrel, cooperatingabutments on thebQltandlrod forshifting theebolt byi movement of the rod, and asleeveextendinginto-theopposite end 7 Inorder. to screwthe sleeve 25onto the barrel 15, the flanged, outer end26s-of the of said opening andengaging the barrel for fixing the same relative to the support.

2, A device ot the character described adapted forv mounting on a;support having an openingtherethrough, comprising abarrel extending intoone end of said'opening and having abutmentlmeans at its outer end, anoperating rod movable in said barrel, a

knob on the barrel between said abutment means and the surface of thesupport, and a sleeve extending into'the opposite end of said openingand engaging the barrel for fixingjthe sleeve andknob relative to thesupport. a

BrA device of the, character described;

adapted for mounting ona jmovable support 1 having an openingtherethrough, comprising a barrelfextendlng nto one end ofthe open1ng,.me'ans for latching j the support, an

operating rod. for the latching means movable 1n saldbarrel, and fasleeve extendrng into the opposite end of' said} opening and engagingthe barrel for: fixing the same relativerto th'e support,the outer endofthe sleeve and the adj acent end of the operating rod beingadaptedffor engagement by a key for rotatabjly adjusting said partsrelative to the barrel. t

LA device of thencharaeter described adapted formount-ing on a movablesupport having an opening therethrough, comprising; a barrel extendinginto one end ofsaid openi ing and having abutment means at its outerend, a push button slidable in theflbarreland having a shoulder engagingsaid abutment means for limiting the projection of the push buttonbeyond the jouter end of the barrel,means for latchingthe support, an

operating .rod for the latching means fixed to said "push button anjdprojecting beyond the inner] end [of the barrel, spring means tendingtog reti act'the operating rod and project the push button beyond theouter endjofv the barrel, and a" sleeve extending into the opposite endof said opening-and engag ng the arrelafor fixin'g thesamerelative tothelsupporti 5. A device of 1 having Opening. a e h bugh; pris ing abarrel extendingjinto one, end ot the opening, a push button adapted foranial movement )in fsaid 'barrel but held against rotation therein meansfor latching thesup-f port, an operating rod for the latchinghecharacter describedz' adaptedr0 mount ng on a movable support;

means fixed to thepush button"gandprojech ing beyond the inner end ofthe barrel; and a sleeve extending into the opposite ,end; of'

said openirignnd engaging the barrel "for fixing the same relative tothe support. I

In testimony wliereofhe has afiixedh-i's signature, to thisspecification. r

' IS' MAXON;

